The best place to find information about a sauna bath is at a gym or a spa/salon which has a sauna bath. They should be able to give you more detailed information.
Sauna baths are large, heated tubs of water that have sprays that act as masseurs. One option is calling Mayfair Pools to find out more information and ask questions.
The best sauna baths for muscle relaxation will depend on what location you are living in. Typically the best location for finding these is at day spas. I would look into an infrared sauna. Do your research as they all kind of look the same online. A good place to start is www.saunabuyersguide.info
There are many health benefits to a sauna bath. Many people claim that the steam from the bath open pores so that toxins can escape. Sauna baths are also very relaxing.
Finland
You can find a guide to building your own sauna when you go to the websites of SaunaFin, The Home Sauna Center, Street Directory, as well as Build A Sauna, etc.
There are plenty of places in order for one to find out reviews for a Finlandia sauna. However, it is recommended that one should check out from the website Sauna Talk.
There are many places where one can find a 2 person sauna. This includes companies such as Zokiuk, The Bathing Place, Tylo Sauna & Steam and even online on Amazon.
Roman baths are similar to modern day sauna's. Though not as private as its modern day equivelent, bathing was one of the most common daily activities in Roman culture.
There is the normal bath, the pool, the sauna and the shower.
Sauna kits of varying size and cost can be located online through the Amazon website, as well as the eBay, Sauna Fin, Cedar Brook Sauna, and Great Saunas websites.
Steam rooms and baths tend to be better for those with dry skin and sinus problems. Otherwise, it is purely a matter of choice.